Electric gas-lighting burner



(No Model.)

J. E.. SWENDEMAN.' ELEGTRIG GAS LIGHTING BURNER.

No. 552,59Ll. PRtentedJen. '7,1896- JOSEPH E. swENDEMAN, OE BOSTON,

PATENT e OFFICE.

ASSIGNOR TO GEORGE F. PINKHAM,

OF WOLLASTON, MASSACHUSETTS.

ELECTRIC GAS-LIGHTING BURNER. f

SPECIFICATION forming part of Letters Patent No. 552,594, dated January 7, 1896.

Application ined June 7,1895. salaire. 552,031. Nomad To all whom it may concern.-

Be it known that I, JOSEPH E. SWENDEMAN, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain Improvements in Electric Gas-Lighting Burners, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, making part of this speci-` iication, in which- Figure l is a perspective view of an electric gas-lighting burner constructed in accorciance with my invention, the stop-cock being open. Fig. 2 is a vertical section through the center of the same. Fig. 3 is a side elevation of the same, the electrodes being represented in contact with each other. Figs. 4c, 5, and 6 are views representing the movable electrode in diiferent positions. Figs. 7 and 8 are details to be referred to. p

y invention relates to electric gas-lighting burners in which the gas is alternately let on and shut o by turning a gas-cock having connected therewith suitable mechanism for simultaneously producing an electric spark to ignite the gas by causing the terminal of a movable electrode to be wiped past or swept into and out of contact with the terminal of a fixed electrode situated in close proximity to the orifice at the tip of the burner;

' and my invention consists in certain novel mechanism whereby as the gas-cock is turned to let on the gas the movable electrode is raised and caused to make and break contact with the iixed electrode to produce the spark to ignite the gas, and then returned to its original level below the fixed electrode and` out of the way of the flame, as hereinafter more fully set forth, and pointed out in the claims.

In the said drawings, A represents the hollow vertical shell or body of the gas-burner, which is provided at its upper end, as usual, with a tip a, and on one side near its lower end with a supply-pipe b. The shell or body A is composed of two portions l0 12, screwed together at c, and within the lower portion l2 is fitted the vertically-arranged tapering plug d` of the stop-cock, as shown in Fig. 2, the plug d being held in place and drawn up snugly into its scat by a vertical screw e, the head of which fits within a concaverecess at the bottom of the portion 10 and rests upon the top of the portion l2, said screw havinga vertical central apertured extending therethrough and 5 5 forming a portion of the gas-passage leading to the tip a. In the side of the plugd is formed an aperture f, which communicates with its vertical gas-passage and is so placedthat by turning the plug it can be brought into or out 6o of line with the gas-inlet passage 71. to admit `the gas to the portion l0 and tip a or shut it off therefrom, as required. i plug d extends down below the shell A, and `has formed upon its lower end or attached thereto in any suitable manner a Vthumb-piece The stem of the or handle B, by which it can be turned by hand to let on or shut off the gas, a suitable stop-pin 13, Fig. 2, being provided, as usual,

to limit the movement of the plug in either 7o direction.` i

Between the portions l0 l2 is clamped a collar c', having on one side a projection 7s, provided with a vertical aperture within which is placed a sleeve or bushing m, composed of 75 hard rubber or other suitable insulating sub* stance, for the reception of the lower end of the fixed electrode n, Which'is secured in place by a nut and washer, as shown. rlhe upper end of this electrode, which is bent at a right 8o angle, as shown, extends up to apoint in close proximity with the orifice at the tip of the burner, and said electrode is connected, as

` usual, with one pole of the battery by a wire 19.

Y To an arm q, projecting up vertically from 8 5 the collar i and made integral therewith, is

lfulcrumed on a headed screw-pin o" a lever C, which forms the movable electrode, and is provided with a longitudinal slot 25, through which said fulcrum-pin r passes, said slot per- 9o mitting a vertical movement of the lever C as it is swung'or vibrated on its fulcrum-pin. Around the upper end of the lever C is coiled a light spiral spring s, which forms the upper portion of the movable electrode, which is connected through the burner and the gaspipe with the other pole of the battery. The lower end of the spring s is secured to the arm q, and the upper portion of the coil, which is of slightly-reduced diameter and of conical 10o form at the top, extends somedistance above the top of the lever C, its terminal consisting of a straight upright piece 2G, the elasticity of which permits it to be wiped or swept past the rigid terminal 22 of the fixed electrode, thus producing a spark to ignite the gas.

The lower end of the lever C is curved to the right, as shown, and is provided with a notch t, Fig. 7, which is adapted to be engaged by a pin w, Fig. 8, projecting from the inner sur-' face of a disk or oscillating piece D, which is mounted on a stud or hub u, Fig. 3, projecting from the side of the shell A, and is secured in place thereon by a nut 28. A portion of the periphery of this disk D is provided with teeth 29, which mesh with teeth 30 on a horizontal disk or wheel Gr, secured to or madeA integral with the plug (l of the gas-cock or its stem, whereby as said plug d is turned by means of the thumb-piece or handle B to let on the gas the disk D is rotated in the direction ofthe arrow, Figs. 4, and 6, causing the pin 1U to engage the notch t at the lower end of the lever C and raise said lever on the pin r against the resistance ot' the spring s, the terminal 26 of which is thus carried upward by the end of the lever C, and thereby raised above the level of the horizontal terminal of the xed electrode, as shown in Figs. 3 and 5, the upper end of the lever C being at the same time swung upon its fulcrum-pin 1' to the right, causing the elastic terminal 2G to be brought into contact with the terminal 22 of the iixed electrode and wiped past the same, thus producing the spark to ignite the gas, the stop-cock being open to let on the gas when the parts are in this position.

As the terminal 2G of the movable electrode is wiped past the terminal of the fixed electrode the inner curved side 3l, Fig. il, of the lever C is brought into contact with the hub u, as shown dotted in Fig. G, which acts as a stop to prevent further movement of the lever in this direction, and as the pin continues to travel it instantly disengages itself from the notch t in the lever C, when the said lever is instantly carried back toits original position, as shown in Figs. l and t, by the retraction of the spring s. The lever C does not come into contact with the hub u until the instant after the separation of the terminals 22 and 26, and the rotation of the disk D ceases immediately after the pin w has passed out of the notch t, the gas-cock having then been fully turned to let on the gas. lfVhen the lever C has been carried back to its lowest level after the gas has been ignited, the terminal 2G will be entirely out et the way ot' the flame, as shown in Figs. l and 4, as is necessary to prevent its being injured thereby, and when the stop-cock is rotated in the opposite direction to shut off the gas the backward rotation of the disk D causes its pin w to merely swing' the lever C cuits fulcrum without raising it. Ilence there is no contact of the two electrodes while the gas is being shut oft, no spark being required at that time. Furthermore there is no liability of the electrodes being lett in contact with each other, as the turning of the gas-cock to let on the gas is sure to separate them and permit the movable electrode to be drawn down by its spring s, while no contact is made on the return movement of the gas-cock to shut ott the gas.

Vhat I claim as my invention, and desire to secure by Letters Patent, is-

l. In an electric gas-lighting burner, the combination with the iiXed electrode, of a movable electrode provided with a longitudinal slot and swinging on a fulcrum pin passing through said slot, said movable electrode being provided with a suitable terminal and having a notch in its lower portion, an oscillating disk or member having a pin or projection adapted to engage the said notch in the movable electrode, and raise and swing the latter on its fulcrum to cause its terminal to make and break contact with the fixed electrode, and a spring for retracting the movable elect-rode after its release, substantially as set forth.

2. In an electric gas-lighting burner, the combination with the plug of the stop-cock arranged vertically within the shell and provided with a thumb-piece or handle projecting below the same, of a toothed disk mounted on a stud projecting from the side of the shell and provided with a pin or projection w, a second toothed disk secured to the lower end of the plug of the stop-cock or its stem, and meshing with the first named disk, a ixed electrode, and movable electrode, the latter provided with a longitudinal slot and swinging on a fulcrum pin passing through said slot, said movable electrode being provided with an elastic terminal and having a notch t, at its lower end adapted to be engaged by the pin w, wherebysaid electrode is raised and its terminal caused to make and break contact with the fixed electrode when the gas-cock is turned to let on the gas, and a spring for retracting the movable electrode after its release, all operating substantially as described.

ln an electric gas-lighting burner of the character described, the combination with the fixed electrode and the movable electrode provided with a longitudinal slot and swinging on a fulcrum pin passing through said slot, said movable electrode having al notch t, at its lower end, of the oscillating disk or member D, mounted on a stud or hub a, projecting from the side oi the burner, and having a pin w, adapted to engage the notch at the lower end of the movable electrode an d raise the latter, said stud or hub u, forming a stop to arrest the movement of the fixed electrode, and enable the pin fw, to disengage itself from the notch t, as the disk D, continues its movement, and a spring for retracting the movable electrode after its release, substantially as described.

lVitness my hand this th day of April, A. D. 1895.

JOSEPH E. S\VENDEMAN.

In presence of P. E. TEscHEMAcHER, EDWIN F. EDeE'rr.

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